2012-01-02 Bruno Haible <bruno@clisp.org>
+ Enhance tests for module 'isatty'.
+ * modules/isatty-tests (Depends-on): Add pipe-posix.
+ * tests/test-isatty.c: Include <fcntl.h>.
+ (DEV_NULL): New macro.
+ (main): Test the resut of isatty() also on regular files, pipes, and
+ /dev/null.
+
New module 'isatty'.
* lib/unistd.in.h (isatty): New declaration.
* lib/isatty.c: New file, based on an idea of
SIGNATURE_CHECK (isatty, int, (int));
#include <errno.h>
+#include <fcntl.h>
#include "macros.h"
+/* The name of the "always silent" device. */
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+/* Native Woe32 API. */
+# define DEV_NULL "NUL"
+#else
+/* Unix API. */
+# define DEV_NULL "/dev/null"
+#endif
+
int
main (void)
{
+ const char *file = "test-isatty.txt";
+
/* Test behaviour for invalid file descriptors. */
{
errno = 0;
);
}
+ /* Test behaviour for regular files. */
+ {
+ int fd;
+
+ fd = open (file, O_WRONLY|O_CREAT|O_TRUNC, 0644);
+ ASSERT (0 <= fd);
+ ASSERT (write (fd, "hello", 5) == 5);
+ ASSERT (close (fd) == 0);
+
+ fd = open (file, O_RDONLY);
+ ASSERT (0 <= fd);
+ ASSERT (! isatty (fd));
+ ASSERT (close (fd) == 0);
+ }
+
+ /* Test behaviour for pipes. */
+ {
+ int fd[2];
+
+ ASSERT (pipe (fd) == 0);
+ ASSERT (! isatty (fd[0]));
+ ASSERT (! isatty (fd[1]));
+ ASSERT (close (fd[0]) == 0);
+ ASSERT (close (fd[1]) == 0);
+ }
+
+ /* Test behaviour for /dev/null. */
+ {
+ int fd;
+
+ fd = open (DEV_NULL, O_RDONLY);
+ ASSERT (0 <= fd);
+ ASSERT (! isatty (fd));
+ ASSERT (close (fd) == 0);
+ }
+
+ ASSERT (unlink (file) == 0);
+
return 0;
}